<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>上传按钮</title>
<style>
	#fileBox{ width:86px; height:34px; overflow:hidden; }
	#fileBox input{ width:100%; height:100%; background:red; }
</style>
</head>
<body>
<div id="fileBox">
	<input type="file">
</div>
</body>
</html>
